Year	current US$
1960	250098812.6287291
1961	255834912.972653
1962	287461509.3177189
1963	343438594.7154421
1964	439066107.76574194
1965	528494088.0239176
1966	635079185.1846509
1967	626477928.7736871
1968	476703743.9568784
1969	415853045.3374609
1970	522696657.93550116
1971	666365964.1136466
1972	831840763.1105857
1973	1144524155.6893375
1974	1500095030.6590693
1975	1378490150.954821
1976	1633280095.6113575
1977	2169414916.9930663
1978	2458142732.2774262
1979	2790553138.547485
1980	3303277787.902514
1981	3388793911.461463
1982	3092375441.4661374
1983	2646797147.2757335
1984	2724805455.2115593
1985	2855002580.2203445
1986	3843484799.5929856
1987	5374050604.246946
1988	5930814760.405333
1989	5452786416.87494
1990	6228403957.7479515
1991	6701840871.629238
1992	6895454920.120825
1993	6044650894.678033
1994	6168434453.075299
1995	6896897128.998001
1996	7217037593.984962
1997	7361979456.817146
1998	8278665075.121586
1999	8768098010.23843
2000	8740536277.602524
2001	7974300125.430333
2002	9278760921.955408
2003	11234405350.089298
2004	13219483215.251945
2005	16184415473.065987
2006	16416030208.036476
2007	20655358676.13769
2008	14738976143.830608
2009	10996203444.884438
2010	11655447395.234598
2011	13450225651.450644
2012	13461900235.838549
2013	16010321394.187838
2014	17641035407.378056
2015	17486094485.218422
2016	21200175322.783894
2017	24848957647.00475
2018	26701147667.689236
2019	25374511608.154827
2020	22344770004.719254
2021	25833069095.318005
2022	28588333838.09332
2023	31707527807.34176